Process for the manufacture of double-glazed windows



Sept. 8, 1925. 1 H. KOPPLINGER PROCESS FOR THE mn-umcwuna 0F DOUBLEGLAZED wmnows Filed mm. 14. 1922 frame sides may Patented Sept. 8, 1925.

Hermann 'nsrrtinsan, or ienna, sesame.

PROCESS non THE MANUFACTURE OF DQUBLE-GLAZED VVINIDOHS.

Application filed August 14, 19221 Serial N0.;.5; 81,85 0.

To all whom it may concern: X. y

' Be it known that LIIERMANN KorrLINcnR, a citizen of the Republic ofAustria, residing at Vienna, -Austria, have invented certain new anduseful Improvements in a Process for the Manufacture of Double-Glazedindows (for which application for patent was filed in Austria, February10,1921), of which the following is a specification.

The fact that double windows afford a sufiicient protection from theloss. of heat even when the distance between the panes is merely a fewcentimeters has led to the inner and outer panes being secured to oneand the same section, a single casement-sash window with double glazingthus being obtained. In spite of the great advantages which such windowspossess on account of the simplicity of their manufacture, theyhave notbeen used much, as the inner glass surf ces nno b eaned, an it pp apossible to insure an air tight oint between the two panes. It has;therefore been necessary even in the case of double windows of iron toarrange the outeria nd the inner panes in separate sash frames, in thesame way as is usual in the case of wooden sash windows. But unlike thewell known construction, one of the two sash frames is not hinged to thewindow frame, but to the other sash frame, in order to enable both sashframes to be opened simultaneously. In double windows of this kind itappears desirable to keep the distance between the panes as small aspossible. The minimum dimension is however admissible only when thespace between the panes can be closed in a perfectly air tight manner,that is to say when the two sash frames fit exactly into each other.

According to the present invention, this is rendered possible by aspecial process of manufacture which involves the division of the sashof a double-paned window along a plane lying between the two panes.

In order to enable of effecting this division by punching or shearing,the ends of the be split before the sides are mounted to form thecombined sash. The cutting of the latter into two sashes may be carriedout in such manner, that only one cut is made, for instance by means ofa saw, or else by punching or shearing out a small strip of materialfrom the stock.

This process of manufacturing ensures perfect registry of the anglesopposite each other at the corners; it guarantees exact registryof thetwo sash frames and produces sashes exactly fitting into each other evenwhen the rolled stock used has not been straightened. if i i v A.construction of a double window made according to the inventionillustratedby way of'example in the accompanying drawmg. 7 Y I Figure 1is an elevation of the window, Figure 2 a longitudinal section. A i VFigure 3 a cross-section, and Figure 4 shows the rolled stock used forthe manufacture of the two-sash frames.

1 is the sash frame for the outer glazing, and 2 the sash frame for theinner glazing. The outer sash frame 1 is connected byhinges 8 to thewindow frame 6, hingest to the inner sash frame. The stock used for theinner sashframe agreessubstantially with the usual frame moss-seam; Theouter sash. frame has an. outwardly turned gutter-like extension 5 inwhich is mounted the inner edge of the outer frame. The

gutter or channel 5 is f lled with cement or the like in order to avoidleaky places liable to be formed owing to any unevenness of the rolledstocks.

The window consisting of the inner and outer sash is mounted in theouter frame 6 with a double butt. One butt is formed by the flange 7 ofthe outer sash frame and the outer flange 8 of the frame 6, and theother by the flange 10 of the sash frame 2 and the inner flange 9 of theframe 6. Simultaneous action of the two butts presupposes that thedistance between the two.

flanges 8 and 9 is in fact identical at all polnts and agrees exactlywith the distance between the two flanges 7, 10 of the outer and innersash frames.

Such an accuracy cannot however be obtained in the present state of therolling industry. This drawback is overcome according to the inventionby making the distance between the two flanges 8, 9 of the outer. framegreater than the distance between the flanges 7, 10, and by making oneof the two flanges (for instance the flange 9) of such a small thicknessthat it can be bent by hand or hammered down and easily brought intocontact with the adjoining flange 10 of the sash frame. In orderto avoidthe necessity of rolling undercut sections, the flange 9 to be bentshould be preferably arranged in the same plane as .the flange 11, asshown dotted in Figure 3 of the drawing. The window frame 6 is providedat the inner side with a groove 12 with which engages the flange 10 ofthe lateral part of the sash frame 2, adjacent the hinge 3, for thepurpose of improving the joint between the two sash frames and the frame6, and of making impossible any unauthorized removal of the windows byremoving the hinges 8.

The part above the line a-a is identical with the cross-section of theinner sash and the part below the line bb with that of the outer sash.These parts are united by the stripe of material between the lines a-aand Z -b. From the metal bars having this cross-section pieces of thelength of the sashsides are out and then mounted to form a frame. If nowthe stripe between the lines aa and bb is cut out, for instance by meansof a saw, the resulting two frames will exactly fit into one another.Separating these two frames by punching or shearing would require arather complicated machinery, but the latter can be dispened with, ifthe end parts of said stripes of each side piece are cut out before theframe is mounted. Consequently, after mounting, only the middle part ofthe stripe is to be cut out, which operation can easily be effected bymeans of simple known punching or shearing machines.

What I claim is:

1. A process for the manufacture of double glazed windows with hingedouter and inner sashes, which process consists in preparing rolledfashioned metal bars, the cross-section of which represents the unitedcross-sections of the two sash frames placed side by side with a smallstrip connecting said two cross-sections, forming from these thenuniting the sides to form a frame of the dimensions of the sashes to bemade and thereupon cutting through the remaining joint of the two sashcross sections.

3. A method for manufacturing double glazed windows as set forth inclaim 1, in which method close fitting of the sashes to the outer frameof the window is obtained by bending a thin flange provided on the outerframe of the window so as to touch closely the sash frame.

In testimony whereof I have affixed my signature.

HERMANN KOPPLINGER.

